Re: [Haskell-cafe] Data structure containing elements which are instances of the same type class

On Sat, Aug 11, 2012 at 12:01 PM, Antoine Latter wrote:

It should be pretty easy to write an adapter function of type "String -> (Show a => a)".

Not with that type. Give it a try. Hint: what is the extension of the type variable 'a'? What do you know about it? How would you use that to write the function?